Sheet-metal-working machine.



KRUS E I SHEET METAL WORKING MACHRNE.

APPLICATION F ILED JAN. 29, 1916.

Patented Nov. 13,1917.

3 SHEETS-SHEET I i E p r INVENTOR WITNESSES: fihr firm,

1P, KRUSE. SHEET METAL WORKING MACHINE. APPLICATION FILED IAN. 29,1916. 1,246,437,

7.. V ,E F w V5 m M, l uw m s l m m Q y a 1|} In H I 7 V 1 III I E l u V P Q y. 4 1 I t a s 1 S E S S E N n W P. KRUSE. I SHEET METAL WORKING MACHINE.

APPLICATION FILED JAN. 29. I916.

Patented Nov; 13, 1917.

' 3 SHEETS-SHEET 3.

7 INVEVNTOR WITNESSES: 44m

By Altar/221's, A

N TED I STATES rnrnn xnusn, or BROOKLYN, new YORK,

AssIGivon T'o npw'. BLISS COMPANY, or

' BROOKLYN, NEW YORK, A CORPORATION WEST VIRGINIA,

' SfiEET-METAL-WOBKING MACHINE.

This invention relates to improvements in machines for forming tubes-of sheet matexrial, and mole-particularly tubular can bodies from sheet metal. 3 The present invention provides a machine. capable of runnin l accurately and smoothly at high speed. .T e invention further pro-. vides a machine wherein the construction is simple anddurable, and wherein shocks are minimized. .7 j I -Other advantages and improvements will be hereinafter set fort-.11.. J

Two embodiments are illustrated in the accompanying drawings with reference to which'the invention will be more fully explained. In said d'rawings i Figure 1 shows one embod ment '-in side elevation, andin. partial vertical section;

' tails of the expanding Fig. 2 is an end view, partially in vertical section, of the construction shown in Fig 1; 1 Fig. 2 is a diagrammatic view illustrating the action of the slide-rod, lever and crank shown in Fig. 2. i

s Fig; 3 is a sectional view ofia portion 0f C y the machine on theli'ne III-III, Fig. 2;

Fig. 4 is a view similar to. Fig. 2 showing a second embodiment of the invention.

Fig. 5 isa brokenjaway and in secltlion), illustrating'deorn.

In the drawingslt ingm'echanism is shown as embodied in a sheet working machine comprising an auto matic feed mechanism and certain devices for performing operations upon the sheets,

sfgch as notching and fianging as set forth,

r example, in my United States Patent #1,081,050 dated Dec. '9, 1913. The automatic feed mechanism, notching and flanging mechanisms, could, however, be omitted.

A designates a horn around which the tubular bodies-are formed. The horn may be of any suitable construction, and is preferably of the expandingtype. The sheets are.

wrapped around the horn by means of a pair of wings or folders B B. As shown in the drawing, the wings are pivoted to a bracket Specification of Lettersiatent perspective view (with parts e tubular-body formatentedNov.13, 1917.

Application filed January 29, 1916. sr ai No. 75,022.

frame of the machine. swing around and away from the hornto wrap a sheet around the horn, and to allow the feed of another sheet to the folding mechanism. In a-high speed machine it is desirable that the change of direction of motionbe gradual as the wings approach the ends of their opening and closing movements and s ock thereby diminattached to the main The wings B B i'shed or avoided. It, is furthermore desir--- able that therebe something in the nature of a dwell-in the movement of the wings at their open position. This relative dwell is desirable 'to permit of the feeding of the sheet upon the horn, and the feeding of the previously formed tubular body oifthe horn,

during the interval that the wings .are beyond the line of advanceof the sheets, 2'. e.,

the flat position of the sheets.

In order to operate the wings B B in the .manner described, the wings are connected to a lever'C through suitable connecting rods co, the lever C being suitably pivoted on a pin 0 and being actuated by a crank D throughsuitable connecting mechanism. As shown in the drawings, the crank D'may be in the form ofa pin attached to the face of a gear 03 'on a shaft 03 the gear at meshing with a gear d on a drive shaft d which may receive motion through a pulley d The means connecting the lever C and the crank pin D is preferably in the form of a slide rod d and having slotw? in the lever C, and connected at its outer end to the crank pin D by means of the link 03 In the embodiment shown in Fig. 2, one of theconnecting rods 0 may be connected directly to the lever O, and the other indirectly connected thereto through the pivoted lever 0 slot .0 therein within which works a pin 0 upon the lever C. The lever-c is provided with a counterweight 0 so as to equalize the momentum or inertia thereof with the lever C. v

The crank pin D imparts to the rod d a reciprocating motion which in its to and fro movement is first slow, then accelerates, and then loses speed, becoming againslow. The pin rl sliding within the slot 0 of the lever C being greater at the beginning of the upward movement of the rod (Z and vice versa.v The rod 0Z therefore moves the lever produces a variable moment, the moment the levenc having a reach a point above the line of feed of the the movement becomes so that the wings B B the sheets a sheets, whereupon relatively slower, are above the line of feed of period relatively longer-than that when the wings are below the line of feed of the sheets. The throw of'the lever G is preferably greater above a horizontal line run ning through the pivots c 0, than below said line, which arrangement conduces to' the relatively greater length of time that the folders B, B are above the line of feed of the flat sheets than below said line. The

feeding of the sheets to the horn is facilitated by the relatively greater time interval in which the wings are above the line of feed of the sheets.

Informing tubular bodies from sheets having flanges, and adapted to form a locked seam, it is desirable that the wings, in the final closing movements, at least, shall perform their final closing movements at either substantially the same time, or at times slightly different, one moving slightly ahead of the other, one of the wings, as for instance the wing B which acts on the side of the sheet having the outwardly projecting flange, wrapping the flanged edge of the side of the sheet against which it acts around the horn in such manner that the side of the sheet having the inturned flanged edge may look on the outside of the edge of the sheet having the out-turned flange. By referring to Fig. 2 it will be seen that the pin 0 slides toward the pivot of the lever 0 until the pin 0 is the lever C and 0 and then slides the pivot of the lever 0 At the final closing moments of the wings, the wing B moves a little more rapidly to its final position than the other wing, by reason of the fact that the angular movement at this time of the lever c is greater than that of the lever C.

However, by moving the wings at equal rates during their final closing movements, it is possible to lock the flanges by reason of the spring or resiliency of one of the flanged edges of the sheet, this being effected by the adjustment of the tips 6 b of the wings so that if the wings move at substantially the same rate during the final closing movements this issufticient.

By. referring to Fig. 2 it will be seen that in line with the pivots of away fromv the downward movement of the levers G and c is such that at the end point of the movement the movement of the wings is substan- -tially equal, the wing B, however, .ap-

proaching the equality of speed of movement at a slightly greater rate than" the wing B. In Fig. 2 the positions of the crank D, levers C and c and folders or wings B, B at different instances, are indicated by the numerals 1, 2, 3, etc.

Just after the flanges are locked by the wings B B the horn may be expanded by a wedge-piece 7 coming into contact with an expander slide a which acts to spread the portions a a of the horn, the expanding slide a having cam faces a which act against studs a on the pivoted portions (4 a of the horn. A spring a pushes the expander slide a to normal position, where the stud are not acted on by the cam faces a a See Fig. 5. The wedge-piece f is carried by a crosshead F which is reciprocated by an eccentric and eccentric connecting rod 7, the eccentric being fixed upon the shaft (Z An eccentric sleeve 7 may be provided on the eccentric connecting rod around the pin 7' on the crosshead F for the purpose of adjusting the upward throw of the crosshead. The wedge-piece f is vertically adthus forming the lock seam. After the seam is formed, the horn collapses and the formed tubular body may be ejected from the horn by a feed bar H.

During the feeding of sheets to the horn,

it is preferable to displace or'lower the horn.

This may be effected by mounting the horn A upon a slide a which is normally pressed upward by a spring a lVhen a sheet is fed to the horn the slide a and horn A are pulled downwardly by a cam a acting upon a bell-crank lever a connected to the slide a by a link a T It is desirable to hold the sheet in place between the horn and the underside of the, bracket 7) during the time that the horn is displaced. This may be accomplished by a presserl which may be conveniently mounted inthe underside of the bracket 6. This presser presses the sheet against the horn and holds it untilthe horn rises and presses it against the underside of the bracket and grips it.

As shown in a, the leverC may be connected to the crank pin by means of a connecting rod D and a pin 03 Both the connecting rods 0 0 may, asillustratedin the embodiment shown in Fig. 4, be connected to the lever C. In this construction the action of the lever C may be such as to produce a differential action of the folders B and B.

than below said line, by which arrangement the folders B, B are in a position above the line of feed of the flat sheets a relatively greater length of time than they are below suchline of feed. The movement of the crank pin D also contributes to this end.

While I have illustrated and particularly described several embodiments of my invention, the inventive ideas are capable of other and different mechanical expression.

What I claim is 1. A'machine for forming tubular bodies from sheet-material, comprlsing a horn,-a folder, and means for actuating said folder, said means comprising a lever, two shafts at substantially right angles connected by bevel gears, a crank pin on the face of one of the gears, a connecting rod connected to .said rank pin adapted to oscillate said lever to actuate said folder, a hammer adapted to press the folded ends of the sheet against the horn, and means on said other shaft for actuating said hammer.

' 2. A machine for forming tubular bodies from sheet-material, "comprising a horn, a pair of folders, andmeans for actuating said folders, comprising a lever mounted upon a fixed pivot, connections between said lever and folders, said connections comprising'a connectionbetween said lever and one of said folders and a lever actuated by said 1 first-namedlever and a connection between said second-named lever and the other of said folders.

3. A machine forformingtubular bodies from sheet-material, comprising a horn, a pair of folders, and means for actuating said folders, comprising-a: lever mounted upon a fixed pivot, connections between said lever and. folders, said connections comprising a lever actuated by said first-named lever and having a sliding connection therewith, and a connection between said second-named lever and one of said folders. j p

4. A machine for forming tubular bodies from sheet material, comprising a horn, a

pair of folders, and means for actuating said folders,

said'means comprising a lever and connections between said lever and folders,

said connections comprising a lever actuated by said first-named lever, and a; connection between said levers adapted to produce a differential movement of the second-named lever during a portion' of the 'movement thereof corresponding to the latter part of the closing movements of the folders.

5. A machine for forming tubular bodies from sheet material, comprising a horn,

means for displacing the horn during the feed movement of sheets to the horn, a pair of folders, and means foractuating said folders, said means comprising a lever, connections between said lever and folders, and

means for oscillating said lever. 6. A machine for forming tubular bodies from sheet material, comprising a horn,

means for displacing the horn during the feed movement of sheets to the horn, a

folder, and means for actuating said folder,

said means comprising a lever, connections between said folder and-lever, and a crank for oscillatingsaid lever.

In witness whereof, I have hereunto signed my name in the witnesses. I p

I PETER KRUSE. Witnesses:

FREDERICK L. CoLwELL, J r.,

GUSTAVE R. THOMPSON.

presence of two subscribing 

